diff options
author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-11-04 02:40:09 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-11-04 02:40:09 +0000 |
commit | f8c39a08f6ff651221ff896f8a174abf635f3a0a (patch) | |
tree | ac950750c9c1b65bb563df9c6506858c7f8f30c1 /codecs/mp3/src/cupL1.c | |
parent | ad46ab972ccf439d1dd3a533335b54089c53e431 (diff) |
Remove really broke MP3 stuff in favor of G.726 in the near future
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@1689 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'codecs/mp3/src/cupL1.c')
-rwxr-xr-x | codecs/mp3/src/cupL1.c | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/codecs/mp3/src/cupL1.c b/codecs/mp3/src/cupL1.c deleted file mode 100755 index 3ffe16801..000000000 --- a/codecs/mp3/src/cupL1.c +++ /dev/null @@ -1,319 +0,0 @@ -/*____________________________________________________________________________ - - FreeAmp - The Free MP3 Player - - MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology - Corp. http://www.xingtech.com - - Portions Copyright (C) 1998-1999 EMusic.com - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id$ -____________________________________________________________________________*/ - -/**** cupL1.c *************************************************** - -MPEG audio decoder Layer I mpeg1 and mpeg2 - -include to clup.c - - -******************************************************************/ -/*======================================================================*/ - - -/* Read Only */ -static int bat_bit_masterL1[] = -{ - 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}; - -/*======================================================================*/ -static void unpack_baL1(MPEG *m) -{ - int j; - int nstereo; - - m->cup.bit_skip = 0; - nstereo = m->cup.stereo_sb; - - for (j = 0; j < m->cup.nbatL1; j++) - { - mac_load_check(4); - m->cup.ballo[j] = m->cup.samp_dispatch[j] = mac_load(4); - if (j >= m->cup.nsb_limit) - m->cup.bit_skip += bat_bit_masterL1[m->cup.samp_dispatch[j]]; - m->cup.c_value[j] = m->cup.look_c_valueL1[m->cup.samp_dispatch[j]]; - if (--nstereo < 0) - { - m->cup.ballo[j + 1] = m->cup.ballo[j]; - m->cup.samp_dispatch[j] += 15; /* flag as joint */ - m->cup.samp_dispatch[j + 1] = m->cup.samp_dispatch[j]; /* flag for sf */ - m->cup.c_value[j + 1] = m->cup.c_value[j]; - j++; - } - } -/*-- terminate with bit skip and end --*/ - m->cup.samp_dispatch[m->cup.nsb_limit] = 31; - m->cup.samp_dispatch[j] = 30; -} -/*-------------------------------------------------------------------------*/ -static void unpack_sfL1(MPEG *m) /* unpack scale factor */ -{ /* combine dequant and scale factors */ - int i; - - for (i = 0; i < m->cup.nbatL1; i++) - { - if (m->cup.ballo[i]) - { - mac_load_check(6); - m->cup.cs_factorL1[i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)]; - } - } -/*-- done --*/ -} -/*-------------------------------------------------------------------------*/ -#define UNPACKL1_N(n) s[k] = m->cup.cs_factorL1[k]*(load(m,n)-((1 << (n-1)) -1)); \ - goto dispatch; -#define UNPACKL1J_N(n) tmp = (load(m,n)-((1 << (n-1)) -1)); \ - s[k] = m->cup.cs_factorL1[k]*tmp; \ - s[k+1] = m->cup.cs_factorL1[k+1]*tmp; \ - k++; \ - goto dispatch; -/*-------------------------------------------------------------------------*/ -static void unpack_sampL1(MPEG *m) /* unpack samples */ -{ - int j, k; - float *s; - long tmp; - - s = m->cup.sample; - for (j = 0; j < 12; j++) - { - k = -1; - dispatch:switch (m->cup.samp_dispatch[++k]) - { - case 0: - s[k] = 0.0F; - goto dispatch; - case 1: - UNPACKL1_N(2) /* 3 levels */ - case 2: - UNPACKL1_N(3) /* 7 levels */ - case 3: - UNPACKL1_N(4) /* 15 levels */ - case 4: - UNPACKL1_N(5) /* 31 levels */ - case 5: - UNPACKL1_N(6) /* 63 levels */ - case 6: - UNPACKL1_N(7) /* 127 levels */ - case 7: - UNPACKL1_N(8) /* 255 levels */ - case 8: - UNPACKL1_N(9) /* 511 levels */ - case 9: - UNPACKL1_N(10) /* 1023 levels */ - case 10: - UNPACKL1_N(11) /* 2047 levels */ - case 11: - UNPACKL1_N(12) /* 4095 levels */ - case 12: - UNPACKL1_N(13) /* 8191 levels */ - case 13: - UNPACKL1_N(14) /* 16383 levels */ - case 14: - UNPACKL1_N(15) /* 32767 levels */ -/* -- joint ---- */ - case 15 + 0: - s[k + 1] = s[k] = 0.0F; - k++; /* skip right chan dispatch */ - goto dispatch; -/* -- joint ---- */ - case 15 + 1: - UNPACKL1J_N(2) /* 3 levels */ - case 15 + 2: - UNPACKL1J_N(3) /* 7 levels */ - case 15 + 3: - UNPACKL1J_N(4) /* 15 levels */ - case 15 + 4: - UNPACKL1J_N(5) /* 31 levels */ - case 15 + 5: - UNPACKL1J_N(6) /* 63 levels */ - case 15 + 6: - UNPACKL1J_N(7) /* 127 levels */ - case 15 + 7: - UNPACKL1J_N(8) /* 255 levels */ - case 15 + 8: - UNPACKL1J_N(9) /* 511 levels */ - case 15 + 9: - UNPACKL1J_N(10) /* 1023 levels */ - case 15 + 10: - UNPACKL1J_N(11) /* 2047 levels */ - case 15 + 11: - UNPACKL1J_N(12) /* 4095 levels */ - case 15 + 12: - UNPACKL1J_N(13) /* 8191 levels */ - case 15 + 13: - UNPACKL1J_N(14) /* 16383 levels */ - case 15 + 14: - UNPACKL1J_N(15) /* 32767 levels */ - -/* -- end of dispatch -- */ - case 31: - skip(m,m->cup.bit_skip); - case 30: - s += 64; - } /* end switch */ - } /* end j loop */ - -/*-- done --*/ -} -/*-------------------------------------------------------------------*/ -IN_OUT L1audio_decode(void *mv, unsigned char *bs, signed short *pcm) -{ - MPEG *m = mv; - int sync, prot; - IN_OUT in_out; - - load_init(m, bs); /* initialize bit getter */ -/* test sync */ - in_out.in_bytes = 0; /* assume fail */ - in_out.out_bytes = 0; - sync = load(m,12); - if (sync != 0xFFF) - return in_out; /* sync fail */ - - - load(m,3); /* skip id and option (checked by init) */ - prot = load(m,1); /* load prot bit */ - load(m,6); /* skip to pad */ - m->cup.pad = (load(m,1)) << 2; - load(m,1); /* skip to mode */ - m->cup.stereo_sb = look_joint[load(m,4)]; - if (prot) - load(m,4); /* skip to data */ - else - load(m,20); /* skip crc */ - - unpack_baL1(m); /* unpack bit allocation */ - unpack_sfL1(m); /* unpack scale factor */ - unpack_sampL1(m); /* unpack samples */ - - m->cup.sbt(m, m->cup.sample, pcm, 12); -/*-----------*/ - in_out.in_bytes = m->cup.framebytes + m->cup.pad; - in_out.out_bytes = m->cup.outbytes; - - return in_out; -} -/*-------------------------------------------------------------------------*/ -int L1audio_decode_init(MPEG *m, MPEG_HEAD * h, int framebytes_arg, - int reduction_code, int transform_code, int convert_code, - int freq_limit) -{ - int i, k; - long samprate; - int limit; - long step; - int bit_code; - -/*--- sf init done by layer II init ---*/ - if (m->cup.first_pass_L1) - { - for (step = 4, i = 1; i < 16; i++, step <<= 1) - m->cup.look_c_valueL1[i] = (float) (2.0 / (step - 1)); - m->cup.first_pass_L1 = 0; - } - - transform_code = transform_code; /* not used, asm compatability */ - - bit_code = 0; - if (convert_code & 8) - bit_code = 1; - convert_code = convert_code & 3; /* higher bits used by dec8 freq cvt */ - if (reduction_code < 0) - reduction_code = 0; - if (reduction_code > 2) - reduction_code = 2; - if (freq_limit < 1000) - freq_limit = 1000; - - - m->cup.framebytes = framebytes_arg; -/* check if code handles */ - if (h->option != 3) - return 0; /* layer I only */ - - m->cup.nbatL1 = 32; - m->cup.max_sb = m->cup.nbatL1; -/*----- compute nsb_limit --------*/ - samprate = sr_table[4 * h->id + h->sr_index]; - m->cup.nsb_limit = (freq_limit * 64L + samprate / 2) / samprate; -/*- caller limit -*/ -/*---- limit = 0.94*(32>>reduction_code); ----*/ - limit = (32 >> reduction_code); - if (limit > 8) - limit--; - if (m->cup.nsb_limit > limit) - m->cup.nsb_limit = limit; - if (m->cup.nsb_limit > m->cup.max_sb) - m->cup.nsb_limit = m->cup.max_sb; - - m->cup.outvalues = 384 >> reduction_code; - if (h->mode != 3) - { /* adjust for 2 channel modes */ - m->cup.nbatL1 *= 2; - m->cup.max_sb *= 2; - m->cup.nsb_limit *= 2; - } - -/* set sbt function */ - k = 1 + convert_code; - if (h->mode == 3) - { - k = 0; - } - m->cup.sbt = sbt_table[bit_code][reduction_code][k]; - m->cup.outvalues *= out_chans[k]; - - if (bit_code) - m->cup.outbytes = m->cup.outvalues; - else - m->cup.outbytes = sizeof(short) * m->cup.outvalues; - - m->cup.decinfo.channels = out_chans[k]; - m->cup.decinfo.outvalues = m->cup.outvalues; - m->cup.decinfo.samprate = samprate >> reduction_code; - if (bit_code) - m->cup.decinfo.bits = 8; - else - m->cup.decinfo.bits = sizeof(short) * 8; - - m->cup.decinfo.framebytes = m->cup.framebytes; - m->cup.decinfo.type = 0; - - -/* clear sample buffer, unused sub bands must be 0 */ - for (i = 0; i < 768; i++) - m->cup.sample[i] = 0.0F; - - -/* init sub-band transform */ - sbt_init(m); - - return 1; -} -/*---------------------------------------------------------*/ |